Hydrometer chamber



sept. 11, 1928.

G. A. SMITH HYDROMETER CHAMBER Filed July 2, 1925 ATTORNEY Patented Sept. 11, 1928.

PATE-Nr ori-flee.

GEORG-EIA. SMITH, OFBALTIMOBE, MARYLAND.

HYDRQMETER CHAMBER.

VAppplioation filed July 2,

said containerinto said hydrometer. cham-l bei' at thetime when it isdesired to test the density of the samef'or the purpose ofrdeterl ininingiti jreezing point. A special adaptation Vofthc invention is its use in connection with the cooling system of a. gas engine7 t0 which .it'may be permanently or temporarily attached for the purpose ot testing the qualf ity dt the cooling medium. in said engine. Y

The device oil. thisapplication is an im-V provenienti upon the invention described and claimed in my copentgling application serially numbered 631,558 filed April 12, 1923. Y

Theobject of the invention is the equi ment of a engine with a hydrometer .chamber,l whereby thedensityof the cooling lluidof the engine may beV read at will. Another object `is the prouision of means whereby the `{fiuid in thecooling system of the enmaybe admitted to the hydometer cham.` ber at will for testing purposes, and means for unthdrawing the fluid from the hydrometer chamber after the testing. A nother object the associationv l` in a singlechamberof a hydronieter and a thermometer, whereby the density reading and temperature correc-A tion oi? `a fluid may be readily determined inu ascertaining act-ual freezing temperatinge. y

Other obj ects` and advantages. of the invention will hereinafter',*appear in the following description `and the novel features thereof will bepertieulerly Pointed., out in the arf rcndedlams. v Lilie reference numerals indcateulige parts throughout the several figures of the drawings, in which 1 i l Figure 1 is anelevationot my invention, l Figure@ isa scctionalyiew taken upon the line AWB of Figure 1,` 1

Figure 3 is a plan, i Figure lis an elevation ot a modified form of connecting or coupling elementwof my. invention, n

Eigures 5 andare `views of one element of a modified orm of coupling'or connector,

Figure 7 is a view of the companion element of said modified coupling, andA Figure 8 is a side elevation of said modified coupling when in use.

192,3. serial ng. Mensa Referring to the drawings in detail7 the numeral 1 designatesa metallic cylinder .forming theV body of ,my hydrometcr chamber. The cover Qfis provided withl a flange having screw` threads 3 by means of which the cover is secured in a liquid` tight manner tothe upper screwthreaded end of the cylinderl. A bottom 4l is provided for the cylinder 1 and this is secured .in place by means of a screw threaded flange 5. in uid'tight relationship.

The cylinder l is cut away at one sidcto provide a win dow 6 and within the cylinder there is mounted in sa fluid tight manner thetube of glass T which forms the inner walls oit the chamber 1. A central rodor hydrometer guideertends `from the cover 2, where it is `screw threaded into the lug 9, to` the1 bottom ft, where itis provided with abase 10 forming ay support for the washer of rubber 11 or i.

other suitable material, upon which .the hydrometer 13 rests ininactive position.. The base 10 isprovided with a semi-spherical lower portion, whichts within-a correspondinglyshaped socket 12 made as a part of the bottom L1. By this construction itt-s obvious that' the hydrorneter may be remo'ued.

trom the casing or chamber upon the removal of the cover 2. f

In the lower portion of the casing land within the glass tube 7 there isa short metallic tube 14 which isA designed to support in proper position a rthermometer 15. A. portion of this tube is inwardly bent for this purpose and a ledge provided for the ver-- tical-l support` of the!thermomete1,the 'bulb resting in a recess provided by cutting away a portion of the tube. By the means justdescribed the thermometer` is held against movement within the casing 1. L

At the bottom of the casing there is pr vided a pet cock 16 for draw-ing the liquid from `the casing after atestllhas been made. kThe numeralfl? indicatesan opening ini the glass tubecoinciding with an'opening in an interiorly threaded projection 18: from. `the metal casing l. Withinthis'projection.18 there is mounted a flanged connect-on 19, the

' flange thereofextending beyond. thecontour oftheprojection-andholding in place anut 20? The numeral. 21indicates any pipein which liquid may be flowing, the testing of which may be desired. In my copending ap.- plication hereinbefore referred to, this pipe is a coupling between sections of the rubber hose connection between the engine and the radiator of an automobile. The pipe section 21 is provided with an extension22, in which is mounted a valve 23, and the passageway through this valve registers with a similar passageway in the extension 22. The extension 22 is provided with screw threads with which the nut 20 engages. It will be appreciated that by this construction the casing for the hydrometer may be clamped to the extension 22 at any desired angle and that it may be readilyadjusted by loosening the nut 20. It will be obvious further that when the valve 23 is closed, no fluid will flow into the chamber 1. Upon opening the valve 23, however, liquid will flow `through the passageways 26 in the valve, 25 in the extension and 24 in the connector, into the casing l for `the purpose of testing the density thereof.

In Figure l I have shown a slightly different form of nipple for mounting the easing in plaeeupon a iquid container. This comprises a screw threaded portion 28, upon which a nut similar to that shown in Figures 1, 2 and 3 may be threaded, and a screw threaded portion 31 by means of which the nipple 27 may be secured into a threaded opening in any fluidcontainer, such as an engine wall. The numeral 3()` represents a hexagonal portion to apply a wrench in securing the nipple in place, while 29 represents the handle of the valve mounted in the nipple.

Still another form of separable connector between the casinfr 1 and a fluid container or conduit is shown in Figures 5 to S, in which there is provided a plate 32 having its upper portion curved. This plate is substituted for the threaded end 28 of the nipple 7. The opposite end of the nipple of this form is provided' with a screw threaded extension ,to be screwed into a conduit (shown in dotted lines) or other suitable portion of a fluid container. The casing of the hydrometer cham# ber is provided with a member 36 flanged to form a socket 37 into which the plate 32 is adapted to be inserted. When thus connected the passageways 33 in the plate 32, and 38 in the member 36, are aligned and upon the manipulation of the valve 34, fluid will be permitted to flow from the container into the hydrometer chamber. This form of the invention is particularly adapted for use where it is desirable not to carry they hydro'- meter upon the engine at all times, but only temporarily when the testing of the fluid is proceeding.

' From the'foregoing description, the structural 'details of myy invention will' be-nnder-v stood. It is only necessary to describe its use in connectionwith the testing of thequality of the cooling fluid in a gas engine. Fluid is admitted to the casing and the line 39 indicates a desirable level therefor. The hydrometer will rise from its seat and come to rest with its upper end projecting partially above the fluid level. A reading may then be taken by noting where the fluid level appears upon the scale carried by the hydrometer. 'lhe air in the chamber will escape through the vent 4l. The reading need not be in terms of actual density but in terms of the freezing temperature of the fluid. In View of the variations iny temperature of the liquid at the time of making the reading, a correction must be made for the same. A reading is then taken upon the thermometer 15. This reading will preferably be in terms of the actual correction for the indicated l`tem ierature, and the numeral 40 indicates the scale of corrections. By adding or subtracting the correction from the reading of the hydrometer scale, the freezing temperature of the fluid is ascertained, from which it may be determined whether the fluid contents Should be changed to preventv freezing.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a testing implement, the combination of a chamber comprising a removable cover and bottom, a hydrometer movable within the chamber, means for guiding the hydrometer in the chamber comprising a centrally disposed guide rod detachabl y secured to said cover, ashelf or support at the lower end of said guide rod, and means on the removable bottom for holding the guide rod at its lower end.

2. In a testing implement, the combination a hydrometer mounted to move upon said rod, a thermometer within said chamber comprising a stem and a bulb, and a support for said thermometer comprising a tubular member fitting the inner wall of the cylindrical body and provided with a groove for the reception of the stem of the thermometer and an aperture and shelf at the lower end of said groove for the reception of'said bulb.

In testimony whereof I affix my signature.

GEORGE A. SMITH. 

